Captain Holt wears his Commendation breast bar above his World Trade Center Breast Bar. When the WTC bar is worn, it is worn above all other medals, but below the American Flag bar.
When Boyle goes to confront Pimeto, he knocks off a file from the desk leaving only a pink sheet on it. When they finish talking, the file is back on the desk on top of the pink sheet.
Adrien pressed a fork to Charles' neck during their confrontation. You can see the actor's neck from the side and back flush a very bright red and a diagonal line of makeup becomes visible.
Charles says that he had his cereal, "Nortfluskers", shipped from Oslo, Norway. But in Season 2 Episode 11, when he's eating the cereal during a stakeout, the cereal package has the Swedish flag.
Gina states that her spirit animal is a wolf and she and Charles debate about being an alpha versus a beta. The concept of alpha and beta wolfs in a pack is a misconception based on a single study of one wolf pack, whose data was fundamentally misinterpreted to manufacture the notion of an alpha wolf. Even the author of the study has long since repudiated its findings. There is no such thing as an "alpha wolf."